Looking for a course/ tutorial about Figma at master level

As the title says, I am one of the old school who still deeply enjoys Sketch, but recently, I have been facing challenges keeping the design system organized across a web app and a native mobile app. Also, I am quite fascinated with the integration of AI tools that just appeared in the last year.

I am not looking for a tutorial on how the platform works on a basic level, I can figure that out in less than 3 hours. I am searching for knowledge on how to manage the product in Figma at the highest level, what are the best practices of a design system, and what AI tools are worth using nowadays.

Cheers, thanks!